Terephenylyl-butadienols

ABSTRACT

Terphenyl-butadienols, e.g., 2-(4-p-terphenylyl)-3,4-pentadien2-ol, and their preparation are described. The compounds are useful as anti-inflammatories.

United States Patent [191 Anderson TEREPHENYLYL-BUTADIENOLS [75] Inventor: Paul L. Anderson, Dover, NJ.

[73] Assignees Sandoz, Inc., E. Hanover, NJ.

[22] Filed: Dec. 28, 1973 [2]] Appl. No.: 429,401

[52] US. Cl... 260/618 R; 260/239 B; 260/247.7 A; 260/268; 260/293.53; 260/326.87;

260/512 R; 260/543 R; 260/5676 M;

[ June 24, 1975 3,267,145 8/1966 Lund et a] 260/618 R FOREIGN PATENTS OR APPLICATIONS 2,258,349 6/1973 Germany 260/618 R OTHER PUBLICATIONS Gelen et 211., Chemical Abstracts, Vol. 77, Abstract No. 113707u (1972).

Primary Examiner-Dona1d G. Daus Assistant ExaminerD. B. Springer Attorney, Agent, or Firm-Gerald D. Sharkin; Richard E. Vila; Frederick H. Weinfeldt [57] ABSTRACT TerphenyI-butadienols, e.g., 2-(4-p-terphenylyI)-3,4- pentadien-Z-ol, and their preparation are described. The compounds are useful as anti-inflammatories.

2 Claims, N0 Drawings TEREPHENYLYL-BUTADIENOLS This invention relates to butadienols, and more particularly, to 4-terphenylyl-butadienols, as well as to pharmaceutical compositions containing such compounds and to the pharmaceutical use of such compounds.

The compounds of this invention may be conveniently represented by the formula I:

wherein R is a hydrogen atom, methyl or ethyl, preferably methyl.

Compounds l are obtainable by reducing with a com plex metal hydride; a corresponding alkynol compound of the formula II, (process a):

wherein R isas defined above; and

QQO

L is either a. a quaternary ammonium radical;

b. an ether selected from the group consisting of tetrahydrofuran-Z-yloxy; tetrahydropyran-2- yloxy or 4-methoxy-tetrahydropyran-4-yloxy;

c. halo having an atomic weight of from about 19 to 127, e.g., fluoro, chloro, bromo, or iodo; or

d. a sulfonylcxy radical.

The complex hydride reducing agents may be of the formula Illa or lllb:

z z" I l M e Z 1' R 11115, or T H 1111) I l Z 2 wherein T is aluminum, gallium or boron, and Z, Z and Z are, independently, a hydrogen atom,

aluminum hydride and diborane, preferably sodium diethyl aluminum dihydride, lithium aluminum hydride or sodium dihydrobis (2-methoxyethoxy) aluminate.

The complex hydrides (Illa and lllb) are either known and may be prepared by methods described in the literature or where not known may be prepared by methods analogous to those for preparing the known compounds. Many of the complex hydrides are commercially available.

Process a) should be carried out in a medium which is not detrimental to the reaction, such as in an aprotic organic solvent, e.g., and ether such as diethyl ether, tetrahydrofuran or dioxane, an aromatic medium, such as benzene, toluene or pyridine or a saturated aliphatic hydrocarbon, such as pentane, hexane or octane. The medium may be a mixture or a single material. The reaction may, for example, be carried out at about 40 to +l20C., e.g., at the boiling point of the medium. However, temperatures of from about lO to +50C. are preferred. While the higher temperatures result in a faster reaction rate, reactions carried out at lower temperatures tend to give purer products. The reaction product (a Compound I) may be recovered by conventional means, e.g., by carefully adding a small amount of water or aqueous solution, e.g,, aqueous ammonium chloride. or sodium hydroxide to the reaction mixture, filtering off the inorganic byproducts or hydrolysis products of the hydride ion source. and then separating the Compound I product from the organic phase by such means as precipitation, extraction, crystallization, chromatography or liquid-liquid extraction. As will be appreciated by those skilled in the art, it is preferred to exclude moisture from the reaction, e.g., by use of anhydrous solvents and conditions. The reaction may be advantageously carried out in an inert atmosphere, e.g., under nitrogen gas.

The compounds of formula ll in which L is a quaternary ammonium radical are compounds of formula Ila:

A and R are as defined above; and L is the radical:

wherein R' and R independently represent alkyl having I to 4 carbon atoms; unsubstituted cycloalkyl having 5 to 6 ring carbons, i.e., cyclopentyl or cyclohexyl; or together, with N, represent a heterocyclic ring having 5 to 7 members selected from the group consisting of unsubstituted pyrrolidino, piperidino, homopiperidino, morpholino, and their alkyl substituted derivatives containing from 1 to 3 alkyl groups of l to 4 carbon atoms;

R" represents alkyl having 1 to 4 carbon atoms, e.g., methyl, ethyl, propyl or butyl including isomeric forms where they exist, although the unbranched alkyls are preferred, especially methyl, and X is an anion derived from a mineral acid or an organic sulfonic acid, provided that X is not fluoro, e.g., iodo or methylsulfonyl. Compounds lla can be prepared by quaternizing a compound of the formula V:

wherein A, R, R and R are as defined above, with a compound of the formula VI:

wherein A and R are as defined above, and L" is tetrahydrofuran-2-yloxy, tetrahydropyran-2- yloxy or 4-meth0xy-tetrahydropyran-4-yloxy can be prepared by reacting a compound of the formula Vll VII wherein A and R are defined above, with Grignard reagent formed by treating a compound of the formula VIII:

HC I C CH L" wherein L" is as defined above, with ethyl, magnesium bromide in the conventional manner for carrying out Grignard reactions.

The compounds of formulae VII and VIII used in the production of compounds llb are known or can be prepared from known compounds using conventional techniques.

The compounds of formula ll in which L is halo other than iodo, i.e., those compounds of formula llc:

on I

wherein A and R are as defined above with the appropriate halide selected from the group of thionyl chloride or bromide, phosphorus pentachloride or bromide and hydrocarbon sulfonyl fluorides, e.g., benzyl sulfonyl fluoride, tosyl fluoride and mesyl fluoride, in an organic medium such as hexane, benzene or dimethoxyglycol. For the chlorination and bromination a tertiary amine base, such as pyridine, is included in the reaction mixture and the reaction temperature is about 0 to 20C. For the fluorination the reaction temperature is 0 to about lSOC. Compounds of formula II in which L is iodo are conveniently prepared by reacting corresponding compounds of formula llc in which L' is chloro, with sodium iodide in acetone, the reaction being carried out in conventional manner for replacing a chloro with an iodo.

The compounds of formula ll in which L is a sulfonyloxy radical are compounds of formula lid:

('31! A-i':- :Ec--cn r. 11d

wherein A and R are as defined above, and L' is a sulfonyloxy radical which may be either alkylsulfonyloxy in which the alkyl group may be substituted, e.g., halo, or unsubstituted and contain from 1 to as many as l6 or more, preferably 1 to 6 carbon atoms, e.g., methane sulfonyloxy, ethanesulfonyloxy, 3-chloropropanesulfonyloxy, or I- hexadecanesulfonyloxy; or arylsulfonyloxy in which the aryl group is phenyl, naphthyl or substituted phenyl, which may have from 1 to 3 substituents independently selected from the group consisting of alkyl of l to 6 carbon atoms, alkoxy of l to 6 carbon atoms, halo and nitro.

Compounds [Id can be prepared by reacting a com pound of the formula lX above with an appropriate alkylsulfonyl chloride, such as methanesulfonyl chloride, 3-chloropropanesulfonyl chloride or 1- liexadecanesulfonyl chloride or an arylsulfonyl chloride, such as benzensulfonyl chloride, 4- toluenesulfonyl chloride or 2-naphthalenesulfonyl chloride. This reaction is conveniently carried out in pyridine at or about room temperature.

1465 C-CH2-ll wherein R and R are as defined above. This reaction may be carried out at temperatures of to 50C., conveniently at room temperature. and in the presence of an organic solvent such as tetrahydrofuran. The compounds of formula XI are known or can be produced in known manner by reacting a compound of the formula XIV:

wherein R and R are as defined above, with lithium metal at a temperature of 0 to 50C. in a suitable solvent such as ethylene diamine. The compounds of formula V can also be prepared by a process (b) which involves reacting a compound of formula Xll:

XII

wherein A and R are as defined above, with a compound of formula XIII:

no cs n XIII wherein R and R are as defined above.

In process (b), a compound of formula Xll is reacted with a compound of formula Xlll at a temperature of l0 to 50C. preferably at room temperature, in the presence of an inert solvent, and in the presence of mono-valent coinage metal ion, e.g., copper ion, as catalyst, preferably cuprous chloride or cuprous oxide, although salts and the like of other coinage metals, i.e., silver and gold (I), can likewise be used. The compounds of formula XII can be prepared by reacting a compound of formula VII above in a solvent such as dimethylacetamide or dimethylsulfoxide with a suitable acetylene reagent, such as sodium or lithium acetylide conveniently at room temperature.

The compounds of formulae Xlll and XIV used in the above-identified preparations of compounds V are known or can be produced from known materials by conventional techniques. and many are commercially available.

The compounds of formula (I) are useful because they possess pharmacological activity in animals. In particular, the compounds (I) are useful as antiinflammatory agents as indicated by the Carrageenan induced edema test on rats (oral administration at l to 200 mg/kg). For such use, the compounds may be combined with a pharmaceutically acceptable carrier, and such other conventional adjuvants as may be necessary, and administered orally in such forms as tablets and capsules, elixirs, suspensions and the like or parenterally in the form of an injectable solution or suspension. The dosage administered will, of course, vary depending upon the condition being treated and the mode of administration. However, in general, satisfactory results are obtained when administered at a daily dosage of from about I milligram to about 250 milligrams per kilogram, e.g., from about I milligram to about 175 milligrams per kilogram of body weight, preferably given in divided doses 2 to 4 times a day, or in sustained release form. For most mammals, the administration of from about I00 milligrams to about 3000 milligrams, e.g., from about milligrams to about 2000 milligrams, of the compound per day provides satisfactory results and dosage forms suitable for internal administration comprise from about 25 milligrams to about I500 milligrams, e.g., from about 40 milligrams to about I000 milligrams, of the compound in admixture with a solid or liquid pharmaceutical carrier or diluent.

For the above usage, oral administration with carriers may take place in such conventional forms as tablets, dispersible powders, granules, capsules, syrups and elixirs. Such compositions may be prepared according to any method known in the art for manufacture or pharmaceutical compositions, and such compositions may contain one or more conventional adjuvants, such as sweetening agents, flavoring agents, coloring agents and preserving agents, in order to provide an elegant and palatable preparation. Tablets may contain the active ingredient in admixture with conventional pharmaceutical excipients, e.g., inert diluents such as calcium carbonate, sodium carbonate, lactose and talc, granulating and disintegrating agents, e.g., starch and alginic acid, binding agents, e.g., starch, gelatin and acacia, and lubricating agents, e.g., magnesium stearate, stearic acid and talc. The tablets may be uncoated or coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period. Similarly, suspensions, syrups and elixirs may contain the active ingredient in admixture with any of the conventional excipients utilized for the preparation of such compositions, e. g., suspending agents (methylcellulose. tragacanth and sodium alginate), wetting agents (lecithin, polyoxyethylene stearate and polyoxyethylene sorbitan monooleate) and preservatives (ethyl-phydroxybenzoate). Capsules preferably contain the active ingredient admixed with an inert diluent, e.g., calcium carbonate, calcium phosphate, kaolin or polyethylene glycol. The preferred pharmaceutical compositions from the standpoint of preparation and ease of administration are solid compositions, particularly tablets and solid or liquid diluent-filled capsules.

Representative formulations for administration, 2 to 4 times a day, in treating inflammation are tablets and capsules prepared by conventional techniques and containing the following:

Weight in Milligrams In the following example which is illustrative of the invention, temperatures are in degrees Centigrade, and room temperature is 20 to 30C., unless indicated otherwise.

EXAMPLE 2-( 4-p-terphenylyl )-3 ,4pentadien-2-ol Step A.

To a Grignard mixture prepared from 30.0 g bromoethane and 5 g of magnesium in a total of 600 ml. of dry tetrahydrofuran. 55 g of 3-(2'-tetrahydropyranyloxy)- propyne is added dropwise. After addition is completed, the mixture is refluxed for 1 hour, then 7.2 g 4-acetyl-p-terphenyl dissolved in 500 ml. of dry tetrahydrofuran is added. After addition is completed the mixture is refluxed for 1 hour, cooled. and allowed to stand 18 hours at room temperature. Subsequently, 25 ml. of distilled water is cautiously added to the mixture and the mixture is evaporated under reduced pressure to yield a yellow paste. I00 g of ice is added to the paste followed by 500 ml. of 2% sulfuric acid solution. The aqueous mixture is then extracted with 600 ml. of chloreform. The chloroform layer is separated, dried over anhydrous magnesium sulfate, filtered from drying agent, and evaporated under reduced pressure to yield crude 2-(4-p-terphenyl)-5-(2'-tetrahydropyranyloxy)- 3-pentyn-2 -ol as a dark brown oil.

Step B.

The crude product from Step A is dissolved in 300 ml. dry tetrahydrofuran. To the resulting solution, maintained at 5C. with an ice bath, ml. of a l.() molar toluene solution of sodium diethyl aluminum dihydride is added dropwise via syringe. After the addition is completed, the solution is allowed to warm to room temperature and stand for 66 hours. Subsequently, 20 ml. of a 2% sulfuric acid solution is added to the mixture, and then the mixture is extracted thrice with chloroform. The combined chloroform extracts are dried over anhydrous magnesium sulfate, filtered from drying agent, and evaporated under reduced pressure to yield a yellow paste. The paste is chromatographed on silica gel to yield refined 2-(4-pterphenylyl)-3,4-pentadien-2-ol as a white powder, m.p. l63-l6SC.

Repeating the procedure of this example, but replacing the 4-acetyl-p-terphenyl used in Step A) with an approximately equivalent amount of:

a. l-(p-terphenyl)-propan-l -one; or

b. 4-p-terphenylyl-aldehyde; there is similarly obtained:

a. 3-(4-p-terphenylyl)-4,5-hexadien-3-ol; or

b. l-(4-p-terpbenylyl)-2,3-butadien- 1 -ol.

What is claimed is:

1. A compound of the formula i l i --ci==cacl 

1. A COMPOUND OF THE FORMULA
 2. The compound of claim 1 which is 2-(4-p-terphenylyl)-3,4-pentadien-2-ol. 